Gem bathmat medium size is a perfect square 42.5 cm by 42.5 cm, 95 mm thick. It is comfortable with weight to 130 kilos. The GEM bathmat is made of diatomaceous earth a clay like material formed from fossilised plant matter that is porous. It has been combined with paper pulp to give it bulk, strength and substance. The material is robust and will serve the user well for many years. The main cleaning agent is P-240 sandpaper. Use it to remove dirt or revitalise the powers of absorbency. The mat is a revolutionary alternative to a fabric mat and resistant to bacteria. A best seller in Japan it is tactile, environmentally friendly and represents a step up in your lifestyle.